Two-beam pumped cascaded four-wave-mixing process for producing multiple-beam quantum correlation

Shengshuai Liu, Hailong Wang, and Jietai Jing
Phys. Rev. A 97, 043846 – Published 19 April 2018

Abstract

We propose a two-beam pumped cascaded four-wave-mixing (CFWM) scheme with a double-Λ energy-level configuration in Rb85 vapor cell and experimentally observe the emission of up to 10 quantum correlated beams from such CFWM scheme. During this process, the seed beam is amplified; four new signal beams and five idler beams are generated. The 10 beams show strong quantum correlation which is characterized by the intensity-difference squeezing of about 6.7±0.3 dB. Then, by altering the angle between the two pump beams, we observe the notable transition of the number of the output beams from 10 to eight, and even to six. We find that both the number of the output quantum correlated beams and their degree of quantum correlation from such two-beam pumped CFWM scheme increase with the decrease of the angle between the two pump beams. Such system may find potential applications in quantum information and quantum metrology.

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  • Received 25 November 2017

DOI:https://doi.org/10.1103/PhysRevA.97.043846

©2018 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Atomic, Molecular & Optical

Authors & Affiliations

Shengshuai Liu1, Hailong Wang1, and Jietai Jing1,2,3,*

  • 1State Key Laboratory of Precision Spectroscopy, School of Physics and Materials Science, East China Normal University, Shanghai 200062, China
  • 2Department of Physics, Zhejiang University, Hangzhou 310027, China
  • 3Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, People's Republic of China

  • *Corresponding author: jtjing@phy.ecnu.edu.cn

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Issue

Vol. 97, Iss. 4 — April 2018

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